100kg of a sample of water contained 6 of MgSO_(4) The degree of

1.	100kg of a sample of water contained 6 of MgSO_(4) The degree of
Answer» 6 ppm 60 ppm 5 ppm 500 ppm Solution :`100 kg=10^(5)g rArr "weight" of MgSO_(4)=6G` HARDNESS of `MgSO_(4)=(6g)/(10^(5)g)xx10^(6)=60ppm` hardness in term of `CaCO_(3)=60xx(100)/(120)=50` ppm

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